First thing I would do is to rest the adaptations in the EGS, might as well do them in the EU while your at it, this can only be done via diagnostics and takes around 2 minutes, secondly I would check the box fluid level.
An EGS re flash wouldn't do much,although worth asking BMW if there's an updated version of software for your model, as sometimes on certain models there is but they don't do a recall, they only do it when a customer complains a lot...
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